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TERRESTRIAL FATE:

 

 

Reaction mass of O-isopropyl ethylthiocarbamate (85 -98%) and n-butanol (1% -10 %) and propan-2-ol (1%- 5%) is used in the mining industry as flotation agents as a fine collector for minerals such as copper sulfate, lead, zinc, molybdenum and nickel. The Reaction mass of O-isopropyl ethylthiocarbamate and n-butanol and propan-2-ol is the best collector for copper sulfate. The amount of Reaction mass of O-isopropyl ethylthiocarbamate and n-butanol and propan-2-ol used is very small relative to the quantity of ore treated, being approximately 2 to 50 g/tonne of ore.

 

The flotation process is fully automated. The process takes place in open tanks. However, the concentration of Reaction mass of O-isopropyl ethylthiocarbamate and n-butanol  and propan-2-ol in the flotation tank is low and, therefore, the release of Carbon monoxide; carbon dioxide; oxides of nitrogen; oxides of sulphur (includes sulphur di and tri oxides) would be expected to be low.

Air monitoring data, although limited and of poor quality, indicate that the atmospheric levels of carbon dioxide; oxides are below 10 ppm in the flotation areas. The risk to workers during the flotation process is considered to be low.

 

Reaction mass of O-isopropyl ethylthiocarbamate and n-butanol and propan-2-ol (IPETC) was hydrolytically stable (half life > 1 year) specified by the OECD Guidelines. This substance has a limited potential to bioaccumulate (based on log Kow used by BCF estimates: 3.32, and predicted bioconcentration factors, log BCF = 1.86 (EPIWIN/BCF Program). Reaction mass of O-isopropyl ethylthiocarbamate and n-butanol and propan-2-ol (IPETC) is not expected to contaminate the environment where ore tailings are confined to well constructed tailings dams. Most will be retained on sulphide minerals and destroyed when they are dried after flotation. Minor residues that remain associated with tailings will be destroyed by hydrolysis intailings dams.

 

Based on estimated Koc value of 79.22 L/kg, indicates that Isopropyl Ethyl Thionocarbamate (IPETC) is expected to have very high mobility in soil. Volatilization from moist soil surfaces is not expected to be an important fate process given a estimated Henry's Law constant of 4.71E-006 atm-m3/mole (4.78E-001 Pa-m3/mole). The estimated Henrys Law Constant (25 deg C) measured by calculation from EPI SuiteTM v4.1, HENRYWIN v3.20 Program was 4.71E-006 atm-m3/mole (4.78E-001 Pa-m3/mole) , which is almost zero. This is Exposure Assessment Tools and Models made from EPA (Environmental Protection Agency).

 

 

Thionocarbamateshave not been subjected to regulatory action in any country.The chemical is not listed on the Hazardous Substances Information System (HSIS) .No known restrictions have been identified.

Reaction mass of O-isopropyl ethylthiocarbamate (85 -98%) and n-butanol (1% -10 %) and propan-2-ol (1%- 5%) is used in the mining industry as flotation agents as a fine collector for minerals such as copper sulfate, lead, zinc, molybdenum and nickel. The Reaction mass of O-isopropyl ethylthiocarbamate and n-butanol and propan-2-ol is the best collector for copper sulfate. The amount ofReaction mass of O-isopropyl ethylthiocarbamate and n-butanol and propan-2-olused is very small relative to the quantity of ore treated, being approximately 2 to 50 g/tonne of ore.

The flotation process is fully automated. The process takes place in open tanks. However, the concentration of Reaction mass of O-isopropyl ethylthiocarbamate and n-butanol  and propan-2-ol in the flotation tank is low and, therefore, the release of Carbon monoxide; carbon dioxide; oxides of nitrogen; oxides of sulphur (includes sulphur di and tri oxides) would be expected to be low.

Air monitoring data, although limited and of poor quality, indicate that the atmospheric levels of carbon dioxide; oxides are below 10 ppm in the flotation areas. The risk to workers during the flotation process is considered to be low.

 

Concentrations of Reaction mass of O-isopropyl ethylthiocarbamate and n-butanol and propan-2-ollikely to be found in the tailings slurry may be moderately toxic to aquatic fauna. Such waste streams should therefore not be discharged to waterways.

When suitable precautions are taken to avoid entry of tailings to waterways, the environmental risk ofReaction mass of O-isopropyl ethylthiocarbamate and n-butanol and propan-2-ol can be described as minimal in view of the low environmental exposure and limited persistence.